The effect of the lamb sex and length of lactation on growth and carcass characteristics and meat shear force in corriedale lambs slaughtered at 5 month of age

Authors

  • G. Garibotto Universidad de la República. Facultad de Agronomía. Estación Experimental “Dr. Mario A. Cassinoni”. Ruta 3 km 363. Paysandú. 60000. Uruguay.
  • G. Bianchi Universidad de la República. Facultad de Agronomía. Estación Experimental “Dr. Mario A. Cassinoni”. Ruta 3 km 363. Paysandú. 60000. Uruguay.
  • J. Franco Universidad de la República. Facultad de Agronomía. Estación Experimental “Dr. Mario A. Cassinoni”. Ruta 3 km 363. Paysandú. 60000. Uruguay.
  • O. Bentancur Universidad de la República. Facultad de Agronomía. Estación Experimental “Dr. Mario A. Cassinoni”. Ruta 3 km 363. Paysandú. 60000. Uruguay.
  • J. Perrier Estudiantes de tesis.
  • J. González Estudiantes de tesis.

DOI:

https://doi.org/10.31285/AGRO.07.1034

Keywords:

heavy lambs, sex, weaning, meat production

Abstract

The effect of the lamb sex (ram: lr, wether: lw, cryptorchid: lcand female: lf) and length of lactation (weaned lambs 82 ± 6.8 days and unweaned lambs: 163 ± 7.0 days) on growth, carcass and meat characteristics of 72 Corridale lambs slaughtered at a fixed date with 163 ± 7.0 days of age and 33.0 ± 4.9 kg of live weight were studied. Growth rate from birth to slaughterwas affected by length of lactation (181 vs 158 g/day, unweaned and weaned lambs, respectively; p=0.0006), determining weights to slaughter singificantly higher is not weaned lambs opposite to the weaned ones (34.8 vs 31.8 kg, respectively; p=0.0009) and better body condition (3.4 vs 3.0, respectively; p=0.004). The length of lactation for sex of the lamb interaction was significant (p£0.05) only for carcass weight. Carcass of unweaned lambs were classified with better conformation note that weaned lambs (3.54 vs 3.36, 1-4 scale, respectively; p=0.02). Lamb sex only affected slaughter weight (35.6, 33.4, 32.4 and32.0 kg, lw, lc, lr and if, respectively; p=0.01) and GR values (6.2, 6.4, 6.7 y 8.3 mm, lr, lw, lc and lf, respectively; p£0.05). The cuts from the break-down of carcass and meat color and texture were not affected (p>0.05) for any treatment. 

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Published

2003-06-01

How to Cite

1.
Garibotto G, Bianchi G, Franco J, Bentancur O, Perrier J, González J. The effect of the lamb sex and length of lactation on growth and carcass characteristics and meat shear force in corriedale lambs slaughtered at 5 month of age. Agrocienc Urug [Internet]. 2003 Jun. 1 [cited 2024 May 22];7(1):19-28. Available from: https://agrocienciauruguay.uy/index.php/agrociencia/article/view/1034

Issue

Section

Animal production and pastures
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